Aerodynamic bumper for a truck



FIG. 1 is a right front perspective view of an aerodynamic bumper for a truck showing my new design it being understood that the broken lines are for illustrative purpose only and form no part of the claimed design;

FIG. 2 is an enlarged left front perspective view thereof; and

FIG. 3 is a greatly enlarged left side elevation view thereof. 

The ornamental design for an aerodynamic bumper for a truck, as shown and described. 